Tungsten components
Tungsten heavy alloy components
Overview
The tungsten heavy alloy line delivers components at ~18 g/cc, around 2.5 times the density of steel, for warhead pre-fragments, penetrators, radiation shielding and aerospace balance weights. Built on 25+ years of powder metallurgy, with airworthiness approval for helicopter balance weights and technology transfers from national defence metallurgy laboratories.
High-density tungsten heavy alloy from one of very few manufacturers of it: critical-material supply from an independent source, with no major-power export gate on the material a programme depends on.
Capabilities
- Tungsten heavy alloy series: ~18 g/cc density, around 2.5 times steel, with high tensile strength, toughness, hardness and good machinability
- Defence applications: warhead pre-fragments and penetrators, where tungsten heavy alloy has very few alternatives
- Aerospace: balance weights, vibration dampers, tuning masses and adjusting spacers, airworthiness-approved for helicopter balance weights and spacers
- Radiation shielding that outperforms lead: denser, stronger, less toxic and higher-temperature, in collimators, casks, isotope containers and LINAC shielding
- Technology transfers from a national defence metallurgy establishment: jet-vane pure tungsten and combat-aircraft brake insulator pads
- Backed by 25+ years of powder metallurgy: ferrous and non-ferrous metal powders engineered through controlled atomisation, machined into complex precision geometries
Specifications
| Type | Tungsten heavy alloy components |
| Density | Available under controlled technical briefing |
| Applications | Pre-fragments / penetrators / shielding / balance weights |
| Approvals | Military airworthiness (helicopter weights & spacers) |
| Origin | Independent / non-aligned |
| Traceability | Per production stage |
In depth
Mass in a controlled volume
The material is a tungsten heavy alloy with a published density of about 18 g/cc, around 2.5 times the density of steel. That density concentrates mass where an assembly has limited space. The published material description also identifies high tensile strength, toughness, hardness and good machinability, so density is not the only design consideration. Components can be machined into complex precision geometries rather than treated as simple blocks. The documented defence uses are warhead pre-fragments and penetrators, applications for which the catalogue says there are very few alternatives. Aerospace uses include balance weights, vibration dampers, tuning masses and adjusting spacers. These are different jobs with the same basic requirement: place a defined mass at a defined location and keep the manufactured geometry under control. The product record also identifies radiation shielding as an application. Each production stage is traceable, which gives the buyer a record for a component that may be buried inside a larger weapon or aircraft assembly.
Material, machining and provenance
The producer is described as one of very few manufacturers of high-density tungsten components and as an independent, non-aligned source. Its material work is backed by more than 25 years of powder metallurgy. The same record identifies technology transfers from a national defence metallurgy establishment covering jet-vane pure tungsten and combat-aircraft brake insulator pads. Those are documented areas of transferred know-how, not a general claim about every possible tungsten application. The catalogue lists military airworthiness approval for helicopter balance weights and spacers. It also describes ferrous and non-ferrous powders made through controlled atomisation and the machining of tungsten alloy into complex geometries. A programme therefore starts with the required application, material and geometry, then uses the available traceability through production stages to control the finished part. The stated supply model is one accountable team from briefing through delivery and in-region sustainment. The useful question is not simply whether a dense metal can be supplied, but whether the specified mass, shape and application record can be maintained across repeat production.
A material tied to the assembly
The application determines what matters in the alloy. A penetrator and a pre-fragment use the density, hardness and toughness of the material in a defence design. A helicopter balance weight or adjusting spacer uses the density together with a controlled geometry and the recorded airworthiness approval. A radiation-shielding part uses the same high-density material in a different enclosure and source arrangement. These uses should not be collapsed into one generic component specification. The production record supports that distinction. Powder metallurgy supplies the material foundation, machining supplies the geometry, and traceability follows each production stage. The available technology transfers show experience with jet-vane pure tungsten and combat-aircraft brake insulator pads, while the published aerospace scope covers balance weights, vibration dampers, tuning masses and spacers. A buyer can therefore define the part by application, mass, shape and approval requirement before asking for repeat supply. The independent, non-aligned origin and in-region sustainment model address the supply relationship; they do not replace the drawing, qualification and inspection requirements for the part.
Specification before production
The published density, material properties, application, geometry and approval requirement are the inputs to a component specification. Traceability then follows the part through production rather than stopping at the powder stage.
Why Unstrat: the difference
Unstrat is the authorised global representative and distributor for this capability. It is already in service with a track record behind it, so you are buying something that has done the job elsewhere, not funding a first attempt. You are not the test bed.
Independent, non-aligned origin, with no political exposure to any major-power ecosystem.
One accountable team from first briefing through delivery and in-region sustainment.
One of the very few manufacturers producing high-density tungsten components.
How it reaches you
Related capability
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Procurement & sustainment
Classification and the end-user-certificate chain are confirmed before this capability is represented to your market.
Sourced from an independent manufacturer: no major-power disclosure rules or political conditions.
A single team responsible from first briefing through delivery: not a chain of foreign primes to integrate yourself.
Lifecycle support and operator training delivered in-region, building capability that outlasts the initial deployment.
Applications it supports
Questions buyers ask
What is tungsten heavy alloy used for?
It is the material of choice wherever a lot of mass has to fit in very little volume. In defence that means warhead pre-fragments and penetrators, where tungsten heavy alloy has very few alternatives; in aerospace it means balance weights, vibration dampers, tuning masses and adjusting spacers; in radiography it means collimators and shielding. Our tungsten heavy alloy series sits at around 18 g/cc, roughly 2.5 times the density of steel, and those parts are in service work rather than laboratory samples.
See: Tungsten heavy alloy componentsTungsten as a national capability
Tungsten heavy alloy density: how dense is it really?
The whole industry lands in a narrow band. Our alloy is published at around 18 g/cc, Plansee's DENSIMET and INERMET range covers 17.0 to 18.8 g/cm³, and Elmet's K1700 to K1850 grades cover 17.0 to 18.5 g/cm³. Anyone claiming a decisive density advantage over the others is selling you a rounding error. The differences that matter are grade documentation, machining to your drawing, and whose export desk sits between you and delivery.
Who supplies tungsten penetrators and pre-fragments?
Very few firms will put ordnance applications in print. Plansee's and Elmet's published documents name medical collimators, well-logging shielding, balance weights and counterweights, and neither addresses ordnance use, which is an observation about their documents rather than about what they can supply. Our published applications start with warhead pre-fragments and penetrators, and the line also carries jet-vane pure tungsten and combat-aircraft brake insulator pads under technology transfer from a national defence metallurgy establishment.
See: Pre-fragments, penetrators and shieldingEffectors and munitions without foreign conditions
Tungsten alloy supplier outside the US and EU
That is the question behind most enquiries we receive, and it is a fair one. We represent one of the very few independent producers of high-density tungsten components outside the major-power blocs, built on more than 25 years of powder metallurgy, with traceability held per production stage. Plansee manufactures in Austria under the EU regime and Elmet in the United States under ITAR and EAR jurisdiction, both inferred from their stated production locations rather than claimed in their documents.
Tungsten heavy alloy components machined to drawing for a munitions programme
Machining is the part most buyers underestimate: tungsten heavy alloy is hard, and finished geometry is where cost and schedule are decided. Our components are machined into complex precision geometries in-house on a powder metallurgy line of more than 25 years, with tolerance and material traceability documented through every production stage. Pre-fragments, penetrators and shielding parts are supplied as finished components rather than as bar stock you then have to find a machinist for.
See: Manufacturing route and traceability rowsTungsten component applications
Airworthiness-approved helicopter balance weights supplier
Balance weights are flight-critical, and the approval matters more than the metal. Our helicopter balance weights and adjusting spacers carry military airworthiness approval, and the same line supplies vibration dampers and tuning masses. Plansee treats its balancing weights as Flight Safety Parts and documents that discipline in detail; Elmet lists balance weights among its applications without stating an airworthiness classification. Ask all three for the approval scope against your platform and aircraft type.
Best alternative to Plansee Densimet for a defence ministry
On metallurgy the two are close. Plansee publishes deeper property data, holds semi-finished stock in fixed diameters from 3 to 62 mm, and will quote short lead times from it, so for standard rod next week it is the right call. Our case is a component supplied without an EU export gate, at the same density band, in the part families a ministry actually needs: pre-fragments, penetrators, shielding and airworthiness-approved balance weights.
See: Full Plansee and Elmet comparison tableWhere tungsten sits in the solution set
Do you publish tensile strength and hardness for your tungsten grades?
Not on the site, and we will not invent a table to match one. Elmet publishes UTS 760 to 860 N/mm², yield 550 to 660 N/mm² and hardness Rc 22 to 26 across K1700 to K1850, and Plansee publishes modulus, tensile and elongation curves per grade. We publish density, applications, approvals and traceability, with mechanical values available per part and per qualification. If certified values belong in your tender pack, make them a contractual requirement rather than an assumption.
Tungsten components for a sovereign ammunition plant being stood up from scratch
A new ammunition line usually discovers its tungsten dependency late, after the propellant and case supply are settled. Pre-fragments and penetrators are cheap relative to the round, and impossible to substitute, which is exactly why they make good leverage against a programme. Our components come from an independent producer with technology transfers from a national defence metallurgy establishment behind the jet-vane and brake-insulator work, so the critical material is not the piece that stops the plant.
See: Effectors and munitions solutionTungsten component detail
Can a country building its own guided munitions buy tungsten pre-fragments without a foreign export licence on the critical part?
That is the specific failure mode tungsten supply creates. A pre-fragment costs a fraction of the munition it arms, so a supplier can decline a low-value shipment on dual-use grounds and stall a high-value programme without breaching anything. We supply from an independent, non-aligned source with no major-power export gate on the material, which removes that option from the table. Classification and end-user-certificate governance still apply on our side; what disappears is the third-country veto.
See: Export exposure row for non-aligned buyersFirepower without foreign conditions
Our tender requires ASTM B777 class certification. Can you meet it, and what do you actually publish?
We do not publish an ASTM B777 class, so we will not claim one. Plansee cites AMS-T-21014 and ASTM B-777 classes 1 to 4, and Elmet states it exceeds AMS-T-21014, ASTM B777 and AMS 7725. What we do publish is military airworthiness approval for helicopter balance weights and adjusting spacers, and traceability per production stage. If the class is a condition of award, put it in the contract and ask for the certificate against your specific part.
What should an air force sustaining an ageing helicopter fleet do when its balance weight supplier stops quoting?
Balance weights are the classic obsolescence trap: low value, flight-critical, and single-sourced through the original airframe supply chain. Our line already supplies airworthiness-approved helicopter balance weights and adjusting spacers, machined to drawing, with traceability held per production stage. The practical route is to send the drawing and the approval requirement together, qualify a first article, and take the part out of the airframer's control rather than waiting for the next quote that never arrives.
See: Aerospace balance weights and spacersBalance weight comparison with Plansee and Elmet
Is tungsten heavy alloy from a non-aligned supplier a real substitute, or a compromise you pay for later?
Judge it on two axes. On material, our alloy sits in the same 17 to 19 g/cm³ industry band as the European and American producers, and the parts are fielded: pre-fragments, penetrators, airworthiness-approved balance weights and shielding machined to drawing. On documentation, Plansee and Elmet publish fuller property tables than we do, which is a genuine advantage at design stage. The compromise, if there is one, is paperwork depth rather than performance.
We need tungsten parts for both ordnance and radiography. Does one supplier make sense for both?
It usually does, because the metallurgy and the machining are the same and only the geometry changes. The same line supplies warhead pre-fragments and penetrators, collimators, casks, isotope containers, syringe shields and LINAC shielding, all at around 18 g/cc. One supplier means one qualification route, one traceability record and one relationship to sustain, which matters more over a decade than a marginal price difference on either half.
How do we qualify a new tungsten component source without stopping production on the current one?
Run them in parallel and let the first article decide. Send the drawing, the standard you intend to hold the part to and the test regime; qualification then produces evidence rather than promises, and the incumbent keeps shipping while it runs. Our side of it is machining to your drawing with traceability documented per production stage, on a powder metallurgy line with more than 25 years behind it. Ask for the certification against your part, not against our marketing.
See: Tungsten component detail and approvalsHow the comparison is sourced
Tungsten components: questions
What are Tungsten components?
Tungsten components are Unstrat's Land (Land Domain) capability: The tungsten heavy alloy line delivers components at ~18 g/cc, around 2.5 times the density of steel, for warhead pre-fragments, penetrators, radiation shielding and aerospace balance weights. Built on 25+ years of powder metallurgy, with airworthiness approval for helicopter balance weights and technology transfers from national defence metallurgy laboratories.
How do Tungsten components work?
Tungsten components deliver their effect through tungsten heavy alloy series: ~18 g/cc density, around 2.5 times steel, with high tensile strength, toughness, hardness and good machinability, Defence applications: warhead pre-fragments and penetrators, where tungsten heavy alloy has very few alternatives and Aerospace: balance weights, vibration dampers, tuning masses and adjusting spacers, airworthiness-approved for helicopter balance weights and spacers, capabilities matched to the requirement and confirmed under briefing rather than published.
Who makes Tungsten components?
Tungsten components are built by The Specialty Alloys Producer, whose focus is tungsten heavy alloys & specialty metal powders. Unstrat represents The Specialty Alloys Producer to government and enterprise buyers worldwide as an independent, non-aligned prime vendor.
Why choose Tungsten components over a major-power alternative?
Tungsten components are sourced from an independent, non-aligned manufacturer, so they carry no major-power disclosure rules, upgrade-locks or political ramifications. Concretely: one of the very few manufacturers producing high-density tungsten components. The capability is accountable to you, not to a foreign vendor's government and its release schedule.
How are Tungsten components procured, and where can it be exported?
High-density tungsten heavy alloy from one of very few manufacturers of it: critical-material supply from an independent source, with no major-power export gate on the material a programme depends on. Every engagement begins with a briefing, and export eligibility is confirmed per market under briefing rather than published. Where controlled capabilities are involved, the classification and end-user-certificate chain is confirmed first. Tungsten components are then sustained in-region by one accountable team from briefing through long-term operation.